Liftmaster K320174 replacement Output Gear SL600 & SL1000 Slide Gate Operators
The LiftMaster K320174 output gear is a drive gear used in SL600 and SL1000 commercial slide gate operators. The output gear helps transfer torque through the drive assembly so the chain system can move the gate along the track. When this gear is worn or damaged, the operator may make noise, slip under load, or fail to move the gate properly.
This part is model-specific to the SL600 and SL1000 operator family. Gear failure should be treated as both a parts issue and a mechanical-system warning. A heavy gate, dragging rollers, poor chain tension, damaged sprockets, or a worn worm gear can all contribute to output gear damage. The surrounding drive parts should be inspected before and after replacement.
Common Replacement Reasons
- Output gear teeth are worn, stripped, or damaged
- Operator slips or chatters under load
- Gate movement is weak despite motor operation
- Gear train noise is present in the SL600 / SL1000 drive assembly
- Existing part number or parts diagram calls for K320174
Compatible With
Common Compatible Models
- LiftMaster SL600 commercial slide gate operators
- LiftMaster SL1000 commercial slide gate operators
Additional Model Families to Verify
- SL600 / SL1000 operators with matching drive gear assembly
- Older SL600 / SL1000 units where the original output gear matches K320174
Important Compatibility Notes
- Inspect the K210504 worm gear and related drive hardware at the same time
- Not confirmed for SL575, SL585, SL3000, CSL, RSL, or other slide operator families unless shown in the parts diagram
- Gear failure may indicate gate binding or drive misalignment
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Output gear |
| Part Number | K320174 |
| Application | Drive gear replacement for SL600 and SL1000 slide gate operators |
| Compatible Operator Type | Commercial slide gate operators |
| Related Drive Part | K210504 worm gear is a related SL600 / SL1000 drive component |
| Notes | Check gear mesh, chain tension, and gate rolling resistance |
Also Known As / Related Part Numbers
- K320174
- LM-K320174
- LiftMaster K320174 output gear
- Output gear SL600 and SL1000
- SL600 output gear
- SL1000 output gear
Technician Note
A damaged output gear usually has a cause. Before replacing it, check the worm gear, gear mesh, drive chain, sprockets, gate rollers, and track condition so the new part is not damaged by the same problem.
Before Ordering Checklist
- Confirm the operator is an SL600 or SL1000
- Compare the old output gear to K320174
- Inspect the K210504 worm gear and mating surfaces
- Check chain tension and sprocket alignment
- Manually verify the gate rolls smoothly
Professional Advisory
Drive gear replacement should be performed with the operator secured and power disconnected. A qualified gate technician should confirm safe operation after reassembly.
Important Ordering Warnings
- Do not continue cycling a gate with stripped or slipping drive gears
- Do not install the gear without correcting binding, chain, or sprocket problems
Product Q&A
What is the K320174 output gear used for?
It is a drive gear used in LiftMaster SL600 and SL1000 slide gate operators.
Which models commonly use K320174?
It is listed for LiftMaster SL600 and SL1000 commercial slide gate operators.
Is K320174 related to K210504?
Yes. K210504 is the related worm gear used in the same SL600 / SL1000 drive system, but each part should be verified separately.
What symptoms suggest output gear wear?
Slipping, grinding, poor gate movement, chatter under load, or visible gear tooth damage may point to output gear wear.
What should be checked before replacing it?
Check the worm gear, chain tension, sprockets, track, gate rollers, and overall gate load before installing the replacement.
